Internal-combustion engine.



F. C. LEDVINA.

INTERNAL COMBUSTION ENGINE APPLlCATION FILED JAN.25,1916- 1,225,830, Patented May 15, 1917.

INVENTOR WITNESSES ATTORNEY 1n: noun: nnznsmm ncmunm. wAsummolv. n

FRED C. LEDVINA, OF IRVING, IOWA.

INTERNAL-COMBUSTION ENGINE.

Application filed January 25, 1916.

To all whom it may concern.

Be it known that I, FRED C. LnnvINA, a citizen of the United States, residing at Irving, in the county of Tame and State of Iowa, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

This invention relates to an improved internal combustion engine and the principal object of the invention is to provide an internal combustion engine having an improved type of valve, the improved valve being provided with a controlling plunger and the engine being provided with improved means for controlling the movement of the plunger of the inlet and exhaust whereby the valves will move in timed relation to each other and to the movement of i the cylinder piston.

This invention is illustrated in the accompanying drawings, wherein:-

Figure 1 is a view showing the improved engine in vertical section.

Fig. 2 is a view in elevation of one of the valve plungers.

This engine is provided with. a casing 10 within which there is positioned the cylinder 11 and sleeves or cylinders 12 and 13 which form continuations of the exhaust pipe ll and fuel feed pipe 15.

The piston 16 is slidably mounted in the cylinder 11 and is provided with a piston rod 17 connected with the crank shaft 18 which will be rotatably mounted in the casing 10. This crank shaft 18 is positioned between the crank shafts 19 and 20 whichcarry sprocket wheels 21'and 22 about which pass chains 23 and 24- so that as the crank shaft 18 rotates, rotary motion can be transmitted to the crank shafts 19 and 20. It should be noted that the crank shafts 19 and 20 will have a slower rate of movement than the shaft 18 so that the proper timed relation will be established for the valves controlled by the movement of these crank shafts 19 and 20.

The valve pistons or plunger-s 25 and 26 are slidably mounted in the sleeves 12 and 13 and are connected with the crank shafts 19 and 20 by means of the links'27 and 28 so that as the crank shafts 19 and 20 rotate the pistons or plungers 25 and 26 will be reciprocated in the sleeves. The pistons are each provided with a passage 29 which communicates with a cutout 30 formed in the Specification of Letters Patent.

Patented May 15, 1917.

Serial No. 74,221.

upper face of the piston, the cutouts 29 being so positioned that when the pistons are at their lowest point of movement, the cutouts will register with ports 31 and 32 of the cylinder 11, the port 81 being an exhaust port and the port 32 being an inlet port.

In the operation of this engine, the piston 16 and pistons 25 and 26 will be presumed to be in the position shown in Fig. 1 which will be the position for charging. The piston 16 will now move downwardly thus sucking a charge of gas into the cylinder 11 and at the same time the piston 26 vill move upwardly and piston 25 will move downwardly. The piston 16 will then return to the compressing stroke and upon reaching the upper end of its stroke, the compressed gases will be exploded by the spark plugs 33 and the piston will move downwardly upon its power stroke. By this time, the pistons 25 and 26 will have reversed their positions, the piston 26 being in the upper position and the piston 25 havmoved downwardly so that its passage 29 will register with the exhaust port 31. Upon the next upward stroke of the piston 16 the burnt gases will be driven out of the cylinder. The exhaust port will then be closed and when the inlet portis again opened. a new charge will be drawn into the cylinder 11 and the operation repeated.

1 have therefore provided a motor which is so constructed that it will be free from 'noise, the valves being of the sliding type and thus the noise caused by valves striking a valve seat eliminated. It will be further seen that I have provided an engine which will be very easy running and further that I have provided an engine so constructed that wear upon the valves will be reduced thus making it unnecessary to grind the valves.

What is claimed is:-

An internal combustion engine comprising a casing, a main cylinder in said casing, piston cylinders in saidcasing extending above the casing and open at their upper and lower ends and provided with side openings communicating with the upper end portion of said main cylinder, a driving piston slidably mounted in said main cylinder, valve pistons slidably mounted in said valve cylinders and of greater length than the distance between the openings communicating with the main cylinder and the bottoms of the valve cylinders, the upper end portions of the valve pistons being provided with depressions terminating in side openings registering with the openings communicating With the main cylinder When the valve pistons are at their lowest point of movement, a driving shaft extending into said casing and rotated by said main piston, crank shafts extending into said casing and having connection With the valve pis- In testimony whereof I affix my signature 15 in presence of two Witnesses.

FRED C. LEDVINA. Witnesses R. W. MILLER, J. F. HANSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

